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MIC 103L-A Exam 1 Page 1MIC 103L-A Exam 1(01 May 2017) • Please put your Nameand Student ID Numberon your ScanTron. • Please fill-in Form A. • Please mark your Answers to Multiple Choice Questions on your ScanTron. • Please erase any Mistakes on your ScanTron very Carefully. èxPlease do not ask any Questions during the Exam. ___________________________________________________________________ 1. Your Clan made a Dilution Series using our Emerald Green Food Dye. If there were 7.87 x 1011hypothetical Chromatophores (G= color holders)in each Milliliter in our Emerald Green Food Dye, what was the Total Number of Chromatophores in the entire Contents of your Clan's "4" (10-4) Dilution Tube? A. 3.54 x 107Chromatophores _________________________________________ B. 3.94 x 107Chromatophores _________________________________________ C. 3.54 x 108Chromatophores _________________________________________ D. 3.94 x 108Chromatophores Question 1 Doodle Space
MIC 103L-A Exam 1 Page 22. What two Traits provided the Basis of our Bacillus sp. Selection Strategy? 3. Our EMB Medium can be used to distinguish Enterobacter aerogenes and Escherichia coli (E. coli). Which of the following would indicate that the Bacterium on an EMB Plate was Enterobacter aerogenes? _________________________________________________________________________________ B. • Enterobacter aerogenes grown on EMB produces small Amounts of Acid that precipitate the Dye Methylene Blue, making the Colonies appear Purple. _________________________________________________________________________________ C. • Enterobacter aerogenes grown on EMB produces large Amounts of Acid that precipitate the Dye Eosin, resulting in a Fly-Butt Green Metallic Sheen. _________________________________________________________________________________ D. • Enterobacter aerogenes grown on EMB produces large Amounts of Acid that precipitate the Dye Eosin and the Dye Methylene Blue, resulting in a Fly-Butt Green Metallic Sheen.